GetIntranetIp retrieves and returns the first intranet ip of current machine.

GetIntranetIpArray retrieves and returns the intranet ip list of current machine.

GetIpArray retrieves and returns all the ip of current host.

IsIntranet checks and returns whether given ip an intranet ip.

MustGetIntranetIp performs as GetIntranetIp, but it panics if any error occurs.